1986 S. Bamford & I.D. Stowe BOC Prescott rtd Engine failure1986 New Allen crankshaft & conecting rods fitted.1986 S. Bamford Amoc Oulton Park, RTD after practice with seized crankshaft, when the engine was stripped we found the new crank ground tapered, rods made with too small big end bore - we could never check these measurements in those days.